Headrest-paper supply device



Jan. 2, 1951' 0.,s. CAESAR ETAL HEADREST-PAPER SUPPLY DEVICE 4 Sheets-Sheet 1 Filed Oct. 10, 1947 j-n/mifaras Orin Z1695. 646w Jan. 2, 1951 o. s. CAESAR ETAL HEADREST-PAPER SUPPLY DEVICE 4 Sheets-Sheet 2 Filed Oct. 10, 1947 #FHHI ilHlhailil Jan- Z, 1951 o. s. CAESAR ETAL HEADREST-PAPER SUPPLY DEVICE 4 Sheets-Sheet 3 Filed Oct. 10, 1947 Jan. 2, 1951 o. s. CAESAR ETAL HEADREST-PAPER SUPPLY DEVICE 4 Sheets-Sheet 4 Filed Oct. 10, 1947 Patented Jan. 2, 1 951 UNITED STATES PATENT OFFICE 7 2,536,592 HEADREST-PAPER, SUPPLY DEVICE Orville S. Caesar, Barrington, and Harold G. Wiederhold, Park Ridge, 111., assignors, by direct and mes n'e assignments, to The Greyhound Corporation, Chicago, Ill., a corporation of Delaware Application October 10, 1947, Serial No. 779,070

11 Claims. 1

This invention relates to improvements head-rest paper supply devices, adapted to be attached at the top of a chair back. An important object of the invention is to provide means for covering the head-rest area and for supplying clean paper therefor and for taking up soiled paper. Another object is to provide means for handling the paper in a single length and in such manner that there are always two layers of material covering the head-rest surface.

Various attempts have been made to provide practicable devices which can be used at the top of the backs of chairs of public vehicles. However, all of the devices with which we are acquainted are either unsightly, or too complicated, or too costly, or too cumbersome, or can not be serviced as quickly and easily as is re quired in uses on public vehicles. We believe that we have provided a practicable device which largely overcomes all of the above objections to prior devices.

Another object'of the invention .is to provide three rotatable elements in relation to which the paper is so arranged that soiled paper will lie between the clean paper and the head-rest surface and in a manner to provide a double thickness of material over that surface. Another object of invention is to so movably mount the means for supplying and taking up the paper, that this mounting means when in one position is adapted to hold the material smoothly and tautly against the head-rest surface, and when in another position is adapted to slacken the material to facilitate take-up action of the soiled towel take-up means. Another object is to provide a latching mechanism for the cover of a roll-housing casing in which resilient hinges are used which can and must be sprung to unlatch the mechanism. Another object is to provide a roll-housing casing which can be received in a recess in the rear of the chair back. Another object is to provide for the swinging of a rollhousing casing upwardly to a position over the top of the chair back. Another object is to provide means over which the paper is trained at or near the bottom of the head-rest area and to have this means easily detachable. Another object is to use means for the attachment of the training means, which will yield 'to prevent breaking of the paper when said paper is put under tension against the head-rest area. Another object is to use means to attach the train ing means, which will allow its quick removal and leave the head-rest surfacegand the contiguous surface of the back, free of projections which would interfere with cleaning of the upholstery material. This is particularly valuable where the device herein is used on the seats of public vehicles. Other objects are to provide manual means for applying power to a take-up roll for taking up soiled material; to provide take-up means which is operable by pulling on a cord; to provide a ratcheting mechanism through which take-up power is applied; to so mount the power take-up mechanism that it can move in an axial direction to facilitate servicing; to provide rotativ'e means near the bottom of the head-rest area over which the material is trained after leaving the supply roll and on its return to the soiled paper take-up roll; to provide a housing or casing for the supply and take-up rolls which in some measure conforms to the configuration of the rear surface and top of the chair back; to provide a construction in which a swing frame which carries the supply and take-up rolls can swing upwardly to slacken the paper; to provide a cover for said swing frame which can be swung downwardly; to provide for a downward pulling movement on a cord for the purpose of applying power to operate the take-up roll for take-up action.

Other objects, features, and advantages will be pointed out in the description of the draw-'- ings; and in said drawings:

Fig. 1 is a front elevation of the upper part of a chair back, showing the head-rest covering material held in place by the means about which the material is trained;

Fig. 2 is a view of the rear of the upper part of the chair back showing the arrangement of the casing which encloses the supply and take-up rolls, and with cover of the casing closed;

Fig. 3 is a rear view of the chair back showing the cover of the casing open, and showing the mount frame for the supply and take-up rolls, and the position of the material;

Fig. 4 is a vertical section taken approximately on line 44 of Fig. 2;

Fig. .5 is a vertical section through the casing but with the end of the roll carrying frame in elevation, and also illustrating the locked coverlatching means;

Fig. 6 is a vertical section somewhat similar to but in a different plane from that of Fig. 5., showing the cover latch released;

1 Fig. 7 is a vertical section showing the roll carrying frame in position to slacken paper, and in a position convenient for the operation of Fig. 8 is a vertical section through the mount frame indicating the manner of mounting the supports for the supply roll and for the take-up roll, and illustrating the servicing and take-up mechanisms;

Fig. 9 is a vertical section on line 99 of Fig. 8 illustrating the pawl and ratchet mechanism for taking up soiled paper;

Fig. 10 is a section taken on line ll0 of Fig. 8, but with the roll carrying frame in horizontal position; and

Fig. 11 is a top plan section of the mounting means for the take-up roll, with the mounting spindle positioned to receive the paper core.

Now referring to the drawings: The numeral i generally indicates the back of a chair, having at its rear a recess 2 and having at its top and front a thickened portion 3 providing a head-rest. This chair back may be of the type shown in Patent No. 2,268,765. In the present disclosure the padding is represented at 4 and the finishing material at 5. The shaping and fitting and arrangement of the parts of the casing or housing structure in relation to the recess are claimed, as well as the arrangement of the supply and take-up rolls in relation to the means which holds the paper on the head-rest surface of the chair back. The invention can be used on a chair back which does not have a recess at the back nor a forwardly bulging head-rest portion.

In the recess at the top of the back is disposed a casing which houses the supply and take-up rolls. This is composed of three main parts, the first of which is a sheet metal back shaped to conform to the configuration of the rear and top surfaces of the chair back, the second an upwardly swingalole sheet metal carrier or mount frame for the rolls, the third a downwardly swingable lid or cover which is adapted to be held in closed position by interlocking engagement with the swingable carrier.

In the recess against the rear surface of the fabric of the chair back is suitably secured the back plate I having a flattened portion placed flatly against the corresponding surface of the recess and having a curved portion 8 which extends from a point within the recess upwardly to a point over and against the top of the chair back. This plate I is suitably held in the recess partly by side extensions 9., see Fig. 2, engaging lateral portions of the recess, partly by other fastening devices it. The plate is further provided with a marginal bottom flange I2 extending entirely thereacross. This flange I2 is out out at two points as at I 3. Over each cut-out is arranged one spring metal leaf [5 of a hinge,

this leaf being attached as by welding to the upright surface of the plate I. The other leaf i6 is attached to a flange of a marginally flanged cover I 8. The hinge pintle is indicated at [4. This hinge structure is therefore so made that the inner leaf section can be sprung upwardly to release a cover latching device, later to be described, and part of which is provided by lateral horizontal extensions on the swinging frame on which the supply and take-up rolls are mounted.

The swinging frame is generally indicated at 22 and comprises a single metal plate formed by bending, to substantially the same cross-sectional shape as back plate I, so that plate 22 can, so to speak, assume a nested relation with plate '5 as best shown in Figs. 4, 5, and 6. This plate 22 is hinged to the first mentioned plate 1 as at 25 by means of two hinges the leaves of which lie between the plates '1 and 22, when said plates are nested. The hinging is so arranged that the plate or carrier 22 can swing upwardly out of the recess to the position of Figure '7.

This swing frame or roll mount 22 has lateral horizontal projections 26 adapted to be engaged by notched latch members 21 of the cover, one arranged at each opposite side of the cover as best shown in Fig. 3. To engage these latches all that is necessary is to swing the cover upwardly from its position in Fig. 3, until the members 21 ride over projections 26 to reach the latched position of Fig. 5. During this ridingover action the hinge leaves 15 are slightly raised or flexed upwardly, and then recoil to draw the notches downwardly into latching engagement with the elements 26. When it is desired to unlatch the cover the hand is placed against the bottom of the cover and cover is pulled upwardly in the manner shown in Fig. 6, to release the latches, and is then swung downwardly to the openposition shown in Figs. 3 and '7.

It is a feature of this invention to have the roll mounting frame 22, capable of moving to a position for example like that shown in Fig. 7 whereat the take-up operating mechanism is in a position to facilitate both visually and mechanically the take-up operation. In this particular embodiment the swung frame is adapted to be held by gravity at one side of its pivot 25 as shown in Fig. 7. In this position the convexly curved upper part of the frame engages the top surface of the upholstery material at the top of the chair back. This part or area of the material, is, of course, covered by the head-rest when the device is in use, see Fig. 4.

The mounting of the supply and take-up rolls on a movable frame and the relations of those rolls to a training roller at the front, is important. The invention provides means adapted to control a single length of cover material to move the material across a surface, and provides means for rotatably mounting a supply roll of clean cover material and a soiled material takeup roll, and provides for so arranging the cover material that two layers of material always cover the head-rest surface, and so that the soiled material is behind the clean material.

The swing frame 22 has upright rearwardly extending lateral marginal flanges 39, between which the supply and take-up means are mounted and in which the roll supports are journalled. In this embodiment the supply is below and the take-up above, when the frame 22 is in the position of Figs. 3 and 4.

In Fig. 8 there has been illustrated two structures, one the upper, adapted to take up soiled head-rest paper and the other, the lower, adapted to support a supply roll of such paper which supply is usually wound on a paper core. A feature of the invention is that for both take-up and supply, loading includes the moving of part of the journalling means in an axial direction.

The support for the supply roll core 3|, comprises a spool head disk 32 fixed against rotation to one of the flanges 30, said disk having a projection 33 at the inner side for receiving and centering the core 3| of the supply roll 34. At the other end there is a spool head disk 35 mounted on a pin or shaft 36 adapted to be moved in an axial direction in its bearing 37, integral with flange 36. This movement is against a spring 40. This disk has an inner projection 4| adapted to receive one end of the core 3| as shown. Inward movement of the disk 35 5 under the action of the spring is limited by Suitable collars 42 attached to the stub shaft 36 at the outer side as shown. Although only the core has been shown in this figure it will be understood that a supply of paper is wrapped about it, as shown in Fig. 7. When it is desired .to introduce the supply roll the right end of the core is first engaged over the projection 4| f the disk 35 and is then moved axially, in this instance to the right, until the left end of the core clears the projection 33. Then the core is brought into axial alignment with the projection 33, and is then released to ride over and be centered by the projection, in the position shown. The force for causing this riding over is furnished by a spring 40.

The means now to be described for servicing, supporting, and driving the soiled material takeup core, is believed to be unique, and includes a ratcheting mechanism operableby pull on a .power cord to rotate the take-up core in takeup direction. This structure includes a spool head disk 44 fixed to the flange 35 of the swing frame to which the .previously described fixed disk 32 is attached. This disk has a centering projection 45 at the inner side adapted in this instance to receive one end of a tubular metal spindle 46 the opposite end of which is connected by a universal driving joint structure to an inner tubular extension 48 of a spool disk 49 which in turn is mounted for rotation and translation in a manner to be described.

The universal joint comprises a short rod 50 having ball like terminals. Through one terminal a pivot passes to connect the ball with the spindle 46, and through the other ball terminal passes a pivot pin 52 at right angles to the first pin 5| to connect the rod 58 with the tubular extension 48 of the disk 49; The spindle 46 is provided on the outside, in this instance, with four wire-formed longitudinal ridges 53. The ends of wires are passed through openings in the spindle and suitably secured. These ridges provide friction elements which are adapted to be engaged by the inner surface of a paper core 55 which is slid over the spindle in the manner shown, to prevent rotation of the core on the spindle during take-up action.

A feature of this invention is that the takeup spindle 45 with the drive mechanism for it, can be moved axially to permit disconnection of the end of the spindle from the projection 45 of the spool head disk 44. When this end is clear of the projection 45 the spindle, can be swung horizontally outwardly to the servicing position shown in Fig. 11, as will be more fully described.

An additional and unique feature is the manher of mounting and operating the spindle and take-up core. It will be understood that the end of the paper is suitably connected to the core 55, as by piece of adhesive tape 56, and that as the core is rotated soiled material is wound on the core. To operate the spindle the tubular extension 48 of the disk 49 is provided with a shaft 51, which at the inner end is fixed as at 58 by a crosspin to the tubular extension 48. This shaft 51 passes slidably through and is .journalled in the flange of the swing frame. The shaft then passes through a spacer washer tubular extension 64 of a grooved pulley $5. This pulley has :a cord 66 wrapped in its groove and the inner end of the cord is suitably attached as at 61 by passage through an opening in the bottom wall of the groove. The arrangement of this cord is best shown in .Figs. 3, 8,'and .10.

The pulley carries .a spring-urged drive pawl 58 which engages with the teeth of the ratchet wheel as best shown in 9. When the cord :is pulled the pawl drives the ratchet wheel which in turn drives the spindle in take-up direction. As this drive occurs a coiled spring it is wound to store power, for rewinding the cord on the pulley "after each power-pull on the cord. The pulley is rotatable on the extension 54, of the ratchet wheel. The swing frame 2-2 is in the position of Fig. 7 during take-up action in which position the paper is slack instead of taut as in Fig. 4, and a downward pull on the cord can obtain take-up action. The arrangement of coiled spring is best shown in Figs. 8 and i i). outer end attached as at H to a bracket 32 arranged on the outer surface of the flange 3-5. The inner end of the spring is suitabl attached as at 14 in a radial slot, of the tubular extension 64 of the pulley and it is suitably held against disengagement from the slot by a clamping collar l5, engaged about the extension 54-. Tll'i'e cord 66 is provided with a finger piece Ill which normally abuts a bracket l8 as a :stop. As soon as the finger piece is released it .is drawn to this position, shown in Fig. 10, by the spring. To

drive the spindle and wind the spring, the .fingerpiece is pulled in the direction of the arrow which, when the swing frame is positioned as in Fig. 7, is downwardly. The spring is covered by a caplike cup 88 which is held by screw 8! threaded into the outer end of shaft 5?. This cap has a slot 82 through which the spring passes outwardly for connection with the bracket 12. The screw 8| does not clamp the cap to the shaft '57 but only prevents axial'motion of the cap, and

the cap is held against rotation by engagement of the slot 82 wit-h the spring iii.

.In Fig. .11 the spindle 46, for receiving the core 55 is shown in the position to which it is brought preparatory to sliding the core 55 over it. The core is shown as when it is moving toward the end of the spindle as during servicing. It will be understood that before servicing the spindle will occupy the position shown in 8 in which :its left end is centered by the projection 45 of the stationary disk. When servicing is required the spindle is first moved to the right in direction of the arrow, which compresses spring 5 3 and moves the whole ratcheting drive mechanism also to the right. This movement is required to disengage the left end of the spindle from the projection 45, and after this disengagement the spindle is swung horizontally forwardly to the position of Fig. 11. Then the take up core is placed over the spindle, and the end of the paper is 60, then through a tubular extension 6| of a secured to the core.

Now referring to Figs. 1, 4 and 7: An important part of this invention is the manner of holding the paper against the head-rest, by means arranged transversely at or near the bottom of the head-rest area. To do this successfully the means must be such asto easily applied and detached, and when detached must leave the headrest and back engaging areas or surfaces free of fastening devices or brackets which would interfere with the cleaning of the upholstery fabric. To this end a unique construction has been pm It has :it's

7 vided about which the cover material is trained in its passage from the supply roll to the take-up roll. The device is uniquely and detachably secured to a part of the upholstery finished material.

First referring to Fig. 1 the numeral 85 indicates corner finishing material, for example, a bead or piping, running lengthwise of the chair back, at the junctions of the back with the sides, and flanking that port-ion of the surface of the back against which the sitter leans. This material may be of any suitable kind but preferably has the form of piping and as used herein extends from a point at the bottom of the head rest area to the bottom of the chair back. Other equivalent material can be used. In this instance the top portion of each finishing element .85 is formed into an inwardly turned loop 853,

both loops lying at the same horizontal level. Supported transversely and horizontally by and between these loops is a bar 8? having rotatable thereon a tubular element 88 about which the paper is trained in the manner shown in Figs. 4 and 7. On the rod 8i are fixed a pair of disks 89 which serve as spoolheads. These heads are of small diameter, and lying as they do in the re-entrant angle between head rest area and the back, cannot be contacted by a seated person. The bar or rod 8'6 has at each end an opening 90 and through this opening is passed one hooked end of a spring 9!. The opposite hooked end of a spring is hooked through a corresponding loop 88 as shown, and the parts are so proportioned that the springs are under sufficient tension to hold the rod 8'? with suiiicientfirmness in the position shown but allow it to yield upwardly to prevent breaking of the relatively soft paper when put under tension. The manner of arranging the paper and the training of the paper 95, is believed to be unique. When the swing frame is in the covered position, the paper 95 is held tautly against the head-rest surface. When the swing frame is moved to the position of Fig. '7 the paper is slackened and, in this instance, falls into a loop as a result of that slackening. In this slackened condition the take-up operation is very easil performed by pulling down on the fingeriece H.

The spring suspension of the rod 8'! provides a slight yieldability so that when the swing frame is swung from its position of rig. 7 to its position of Fig. 4, the paper can be tautly drawn without breaking it, because if the tension i too great the bar can yield slightly in an upward direction. This is a valuable arrangement because if the take up adjustment of the paper is made carelessly, the tightening of the paper by movement of the swing frame, might break the paper if the lengths were so adjusted as to be too short. On the other hand, the bar 8'! is arranged at such a horizontal level that although it can yield upwardly, the upward yield will not be suficient to prevent full and proper coverage of the head-rest surface. The roller structure projects forwardly so little and is so positioned as not to be engageable by the back or neck of a seated person.

Whether the front surface of the chair back is slightly convex in horizontal cross-section, as is usual, or whether this front surface is straight, the cylindrical roller 88 always holds the paper flatly in relation to the bottom of the head rest area. The suspension of the roller or guide by means allowing the roller to be easily and quickly removed is particularly desirablein bus chair use, to allow cleaning of the upholstery material. The release is had by merely unhooking the springs.

One way of servicing the device when at its position in Fig. '7, is to first pass the end of the paper upwardly behind the yieldable roller 88 and then bring the end upwardly and attach it, as by means of a piece of adhesive tape, to the take-up core 55 which, when the swing frame 22 is in the position shown, is at the bottom or below the supply roll. The core of the supply roll can then be placed on its supports, and proper length adjustment of the paper made by pulling on the cord, and then the frame 22 is swung to the position shown in Figs. 4-6. It is again to be noted that when the frame 22 is in the position of Fig. 7 the take-up roll is at the bottom and. the finger-pull 11 is so disposed that it can be engaged from below the bracket 18 and pulled downwardly. Since this pull cord arrangement is disposed laterally of the paper there is no interference between the hand and the paper as it is adjusted and moved in take-up direction, and as the clean paper moves into headrest covering position.

Servicing may be accomplished by forming a loop in the paper between its supporting rolls, then bringing the loop forwardly over the top of the chair back and over against the head-rest surface, and then passing the roller structure through the loop, and securing it by its springs 91. In this case the loop can be formed while the parts are in the position of Fig. 3.

The mounting of the take-up and supply rolls on a movable support which is normally located at the back of the chair and can be moved upwardly and forwardly over the top of the chair for servicing, is a feature which makes servicing very easy, and at a position where all parts of the device including all rolls or rollers are in full view during the paper attaching, adjusting and take-up operations. Moreover, this arrangement is advantageous because movement of the swing frame can be made after the paper is adjusted, to draw it tautly and hold it securely in proper relation to the head-rest surface or area. In its uppermost position of the frame tension on the single length paper can be relieved so that there is no frictional resistance to the rotation of the take-up roll. The swing frame is held by gravity in its position of Fig. '7. The use of the spool structure at the front with this structure suspended, by spring not only permits the paper to be slipped under and around it easily but allows some yielding to prevent breaking the paper. The heads on the spool structure guide the paper properly and yet this structure is light in weight and neat in appearance and requires no fastening devices which will interfere with the cleanin of the material, after removal of the roller structure.

The arrangement of the roll-housing case in a recess at the rear of the chair back is also believed to be unique and it has the advantage that the housing or casing does not unduly project to encroach on the space in front of the seat behind the one that has the head-rest device thereon. Thus this casing is not likely to be contacted by aperson entering to occupy the chair next behind.

What we claim is:

1. A device adapted to control cover material to dispose the material against a surface comprising, first means for rotatably mounting a roll of cover material, second means for rotatably 9 mounting a cover material take-up roll, third means about which the cover material is trained in its passage from its first to its second means, movable means mounting the first and second means and adapted when in one position to hold the material tautly in relation to the surface and when in another position adapted to slacken the material, and means mounting said third means so that it can yield to permit taut drawing of the material over the surface without breaking the material.

2. A device of the class described comprising, a chair back having a head-rest area, roller supporting means adjacent the bottom of the headrest area, a roller structure and means yieldably and detachably cross-connecting the structure to said roller supporting means, a frame swingable on the back, and means on the frame for supplying clean cover material and taking up soiled material, said clean cover material being adapted to be drawn over said head-rest area and around said roller structure and thence to said soiled material take-up means.

3. A device of the class described comprising, an upholstered chair back having a head-rest area, two loops adjacent the bottom of the headrest area and formed from part of the upholster-' ing material, a roller structure and means connecting it to the loops, a frame swingable on the back, and means on the frame for supplying clean cover material and taking up soiled material, said clean cover material being adapted to be drawn over said head-rest area and around said roller structure and thence to said soiled ma terial take-up means.

4. A device of the class described Icomprising, a frame adapted to be hinged to a chair back, and adapted to swing upwardly to a position over the chair back, means on the frame for supplying clean cover material and taking up soiled material, means about which the cover material is adapted to be trained in its passage from the clean supply means to the soiled material takeup means, and means for yieldably connecting the last mentioned means adjacent a head-rest surface of the chair back.

5. A device of the class described comprising, a frame adapted to be hinged to a, chair back to swing, means on said frame for rotatably mounting a supply roll of cover material and means also on said frame for rotatably mounting a cover material take-up roll, and means about which the cover material is adapted to be trained in its passage from said roll of cover material to said means for taking up cover material, and means for yieldably connecting said means about which the cover material is trained to the chair back in association with the head-rest surface of the chair back.

6. A device to dispose head-rest cover material in head-rest covering position and to take up soiled material comprising, means for rotatably mounting a soiled material take-up roll including an axially translatable shaft, a spindle, means releasably supporting one end of the spindle for rotation, means connecting the opposite end of the spindle to said shaft to allow the spindle to swing out of its normal rotative plane, and means on said shaft for driving the same and movable with said shaft as the shaft is axially translated.

7. A device to dispose head-rest cover material in head-rest covering position and to take up soiled material comprising, means for rotatably mounting a soiled material take-up roll-including an axially translatable shaft, a spindle, means releasably supporting one end of the spindle for rotation, means connecting the opposite end of the spindle to said shaft to allow the spindle to swing out of its normal rotative plane, means on said shaft for driving the same and movable with said shaft as the shaft is axially trans1ated,'said driving means including a pulley-driven ratchet mechanism and a pull-cord for operating the pulley.

8. A device of the class described comprising, a member adapted to be secured to the rear of a chair back, a frame hinged to the back member and adapted to swing upwardly to a position over the chair back, means on said swing frame for rotatably mounting a roll of cover material, means also on said swing frame for rotatably mounting a cover material take-up roll, and third means adapted to be connected to the front of the chair back below the head-rest surface and about which the cover material is adapted to be trained in its passage from said roll of cover material to said means for taking up 1cover ma terial.

' 9. In a device to dispose head-rest cover material in head-rest covering position comprising, a soiled material take-up shaft journalled for axial translation, a spindle connected to the shaft andadapted to be swung out of its normal rotative plane, and means releasably supporting the outer end of the spindle for rotation.

-' 10. In a device to dispose head-rest cover material in head-rest covering position comprising, means for supplying clean cover material, and means for taking up soiled material including, a take-up shaft having a ratchet wheel thereon, a pulley on the shaft having a pawl adapted to drive the shaft in take-up direction, a spring for rotating the pulley in a direction the reverse of its driving direction and adapted to be wound during driving rotation of the pulley, and a pullcord wound on the pulley adapted to drive the 'same.

1 A device of the class described comprising, a first member adapted to be secured to the rear pf a chair back, a frame hinged to the first memher and having thereon means for removably mounting a supply roll of head-rest material and a take-up roll for soiled material, a roller over which the material is trained in its passage from 'ithe supply to the take-up roll, and means for ftion, and means hinging the cover to the first member in such manner that the said cover can and must be raised to unlatch said latching means.

ORVILLE S. CAESAR. HAROLD C. WIEDERHOLD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 838,733 Miller Dec. 18, 1906 857,323 Breakenridge June 18, 1907 1,217,652 Spahr Feb. 27, 1917 1,379,499 Williford May 24, 1921 1,985,222 Menhall Dec. 18, 1934 2,099,183 Trewhitt Nov. 16, 1937 2,425,915 Birr Aug. 19, 194'? 2,449,965 Bell Sept. 21, 1948 

